OKLAHOMA CITY — An Oklahoma forecaster is predicting an unusual weather phenomenon — snow on the ground in all 50 states at the same time.
Patrick Marsh, who works at the National Oceanic and Atmospheric Administration's National Severe Storms Laboratory, says a winter storm passing through the southern U.S. Thursday and early Friday is predicted to leave measureable snowfall in the Deep South, including parts of the Florida Panhandle.

A winter storm warning is in effect in the region.

Marsh says he's trying to collect photos of snow on the ground from all 50 states.

He says he's unsure if such a weather phenomenon has ever occurred before. A spokesman for the National Climatic Data Center didn't immediately return messages left Thursday.